Holly shit u guys i didn't know that my question will start a 3rd world war lol , anyways thanx ALL of u for input , good or bad , every input on a subject is appreciated , i think that now i know what is the difference between 120v and 240v , the reason why i ask , i'm planning to go vertic and i have two x 600w lights cool tube and one 1000w i'm planning to buy another 1000w and i need to buy extra cool tube reflectors for both of my 1000 w lights , , i'm planing to do 2 vertic set up so i have perpetual harvest but we will c how that works , i'm not no electrician but i have a really good knowledge how to wire house and stuff ,i,m in the middle of flipping a house and all electric work i did it myself and it pass the inspection with flying colors lol, believe it or not i did this all with a book from lowe's home improvement about wiring , i was reading the book and i was check in short movies on you tube lol i got skills because they tell u step by step what to do but i'm not all technical on all that difference between 120 and 240 , that part they really left blank , of course they sed that bigger appliances need 240v on that size of a breaker lets say house clothing dryer is on double pole 30 amp breaker they told that stuff but they didn't go in more depth why that's why i thought that i will ask, but after what read here i definitely will be going with 240v